Prior to establishing the Rome offices of Tosetto, Weigmann e Associati in 2003, Duilio was an associate at Allen & Overy, while in 2011 he became a partner at Libonati-Jaeger. Between 1991 and 1998 he served in the Italian diplomatic service, in Italy and Poland. His areas of expertise include industrial and competition law (with particular emphasis on the food and wine industry, on the automotive industry and on art and cultural heritage law), e-commerce and privacy law, company law and cross-border transactions. He has also assisted clients in proceedings before regulatory authorities. He has been a member of administrative bodies of non-profit entities and is currently a member of some boards of directors and boards of statutory auditors of unlisted companies.